Well drill



Aug. 2, 1932. D. c. GROVE ET AL 1,869,892

WELL DRILL Filed May 25, 1929 5 Sheets-Sheet l l WW ' Inventors Attorney Aug. 2, 1932. D Q GROVE ET AL 1,869,892

WELL DRILL Filed May 25, 1929 5 Sheets-Sheet 3 Attorney Patented Aug. 2, 1932 ,UNTE STATES,

, PATENT OFFIC DONALD G, GROVE AND JOSEPH G. BURNS, OF BIG SPRINGS, TEXAS,

WELL DRILL Application filed May 25, 1929. Serial No. 365,882.

This invention relates to a well drilling apparatus, the general object of the invention being to provide means whereby the packing element can be readily removed and replaced in the casing by the drill stem.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts,

to be hereinafter fully described, illustrated in the accompanying drawings, and specifically pointed out in the appended claim.

In describing the invention in detailreference will be had to the accompanying drawings wherein like characters denote like or correspondingparts throughout the severalviews, and in which:

In the drawings: Figure 1 is a view in section and elevation showing the complete arrangement with the tool depending into the hole.

Figure 2 is a longitudinal sectionallview through the bit and a portion of the drill stem.

Figure 3 is an enlarged fragmentary secthrough the upper end portion of the packer.-

Figure 6 is a cross section taken approximately on the line 66 of Figure 3.

Figure 7 is a bottom plan view of Figure 3.-

Figure 8 is an assembly view of elements of the packer.

Figure 9 is a like perspective view of additional elements of the packer. i

In these drawings the'reference character 10 designates a platform and 11 designates generally a light weight rotary for rotating the well casing 12. The casing is provided on its lower end with an enlarged shoe 13 having teeth 14 at its lower end. The reference character 15 designates generally the casing head. Associated with this is the pump pipe 16 which is connected with a pump (not shown). The reference characters 17 designates the reciprocatory cable which is connected with the pump jack (not shown) and serves to raise and lower the drill tool generally designated by the reference character 18. This drill tool is of course made up of sections, Figure 2 showing two of the sections, one being designated by the referencecharacter 19 and the other by theireference character 20; v v The section 20 carries the fish tail bit and all of the sections are formed with bores for forming the'fluid passage 22. The section 20 is provided with'an annular keeper groove 23, adjacent a reduced portion defining a annular shoulder 24.

Referring to Figure 3 it will be seen that the shoe 13 is provided with inwardly projecting lugs functioning as stops for the lowerend qfthe packer. The packer is generally' designated by the reference character 26 and is of sectional construction. For instance it'includes a collar 27 at the. bottom which rests on the stops 25 and this'carries an upstanding sleeve 28 which embraces the complemental portion of the drill stem. 'Surrounding the sleeve are packingv rings 29, .30 and 31. At the top of the packer is an annulus 32 which carries 'spring'pressed balls 33 for cooperation with the aforesaid groove 23. In addition the annulus is provided with spring pressed pawls 34 which cooperate with the shoulder 24. The reference characters 35 and 36 designate the intermediate packing elegether by bolts 37 thus providing a complete packer unit.

'ments between the annulus and the sleeve. All 1 these elements are assembled and fastened to During the drilling operation, the shoe 13 mounted on the casing 2 is normally, at a point on the stem of the drill below the shoulder 24 it and the annular channel or groove 23 on said stem and the pump pressure holds the packer against the stops 25. When it is desired to ing on' the stem of the drilling tool. The casing and packer are raised until the spring pressed pawls 34 pass the shoulder 24 and spring into the recess formed by said shoulder in the drill stem. The casing is then lowerd but the packer is prevented from moving downwardly with the casing by reason of the V spring pressed pawls engaging the shoulder The stem is then withdrawn from the wcasing and it will be obvious that the packing will becaused to move upwardly therewith.

The section of casing to be added is then mounted on the upper end of saidcasing'and is lowered into the hole. The packer is then adjusted on the drill stem in the position shown in Figure 4 of the drawings, in which position it will be noted that the spring pressed pawls 34 are engaged on the surface iofithe drill istem just below the shoulder'24 and the detent balls 33 are engaging the aninular grove 23. The drill and the packer are then inserted in the casing and lowered 'thereinto, the packer being assisted in its downward movement vby thepressure of the liquid 'thereabove in the casing. Vhen the packer reaches the shoe 13 on its downward movement in the casing it again engages the stops :24 and its downward movement is arrested but the drill is permittedto continue its downward movement as the spring pressed balls .33 will readily ride out-of the groove 23 and the spring pressed vpawls34 will -permit passage of the drill stem and shoulder24in this direction, as will-be under- "stood.

It is thought from the foregoing description-that the advantages and novelfeatures of the invention will be readily apparent.

lt is to be understood that changes maybe made .in'the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

Havingthus described the inventiornwhat we claim as new and desire to secure by Letters Patent is In .a'well drill of the class described, a cas-. ling, a shoe on the lower :end of said casing provided with internal stops, a drill tool suspended in said casing and mounted for re .ciprocatorymotiornsaid drill'tool being'provi'ded with a fluid supply-passage, and a packer unit 'emhracingthe drill tool and confined within said casing, adapted when in position to'rest upon the stop carried by said shoe, said .tool including a section provided with an annular groove, said packer being provided with spring pressed balls cooperable with said grove, said section being also provided with an annular shoulder, said packer being further provided with spring pressed p'awls cooperable with said shoulder.

In testimony whereof we afiix our signatures.

DONALD C. GROVE. JOSEPH BURNS. 

